If I understand correctly, this is about spreading load on CPU, not cores. So dual core Intel CPUs won't gain anything from this. But quadcore Intel laptop CPUs would, as they are still not native QC but two dual-core sticked together. On the other hand, AMD K10 family CPUs have very power-independent cores, so even dual-core would benefit. AMD "Griffin" have split power-plane so I suppose this scheduling policy can help lowering power consumption on it.
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